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单词 perihelion
释义
perihelion
noun[CorU]
physicsspecialized
uk
/ˌper.ɪˈhiː.li.ən/us
/ˌper.ɪˈhiː.li.ən/
pluralperiheliauk/ˌper.ɪˈhiː.li.ə/us/ˌper.ɪˈhiː.li.ə/
thepointin an object'sorbit(= acurvedpathinspacearound aplanetorstar)around thesunat which theobjectisclosestto thesun:
近日点
InJanuarytheEarthreachesperihelion.一月份地球到达近日点。
Opposite
aphelion
SMART Vocabulary: related words and phrases
Physics: particular theories & concepts
  • aphelion
  • azimuth
  • chaos theory
  • cryogenics
  • dark matter
  • Doppler effect
  • dynamics
  • element
  • libration
  • locomotive
  • momentum
  • particle physics
  • perigee
  • Planck's constant
  • quantum
  • refraction
  • relativity
  • space-time
  • spatio-temporal
  • string theory
See more results »
(Definition ofperihelionfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

Examplesofperihelion

perihelion
In the low and nominal cases maximum exposure occurs in the southern hemisphere atperihelion, intuitively consistent with a relatively optically thin atmosphere.
From theCambridge English Corpus
Also, the increased daytime period is evident towardsperihelion, escalating further the total daily dose.
From theCambridge English Corpus
One, after a sensational first-sighting, seems to have retreated to outer space; its lastperihelionwas a disappointment.
From theCambridge English Corpus
The general shape of the diurnal profiles betweenperihelionand aphelion are similar, but dose values vary markedly.
From theCambridge English Corpus
Einstein found that his theory correctly ' predicted, ' actually retrodicted, the numerical value of theperihelionadvance.
From theCambridge English Corpus
Einstein's derivation of theperihelionadvance, which was based on an approximation, had, however, one blemish: the uniqueness of the solution remained questionable.
From theCambridge English Corpus
When theperihelionpassage takes place in northern summer, the maximum temperature is lower in the southern hemisphere, so the soil humidity is higher in the south.
From theCambridge English Corpus
The remaining three orbital elements - the longitude of the ascending node, the argument ofperihelion, and the mean anomaly - were each randomly selected from the range 0-360x.
From theCambridge English Corpus
The comet brightened steadily as it approachedperihelion.
From
Wikipedia
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During the 2005perihelionpassage the comet brightened to about apparent magnitude 16.
From
Wikipedia
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Unlike a long-period comet, the nextperihelionpassage of a numbered periodic comet can be predicted with a high degree of accuracy.
From
Wikipedia
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At its closest, it is only 0.26 astronomical units away from the sun, having the 32nd closestperihelionof any minor planet.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
Also, sinceperihelionand aphelion do not happen on exactly the same dates as the solstices, the maxima and minima are slightly asymmetrical.
From
Wikipedia
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In 2004, residents of the southern hemisphere had the opportunity to watch the comet gradually brighten as it raced towardperihelion.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
Increasing the eccentricity lengthens the time spent near aphelion and shortens the time nearperihelion.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/perihelion##
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更新时间：2024/12/28 6:23:01